Place sliced strawberries and mint leaves in a cocktail shaker. Cover with 1 tsp sugar and muddle.
Pour 1 oz hot water over the muddled mixture and cover for 5 minutes.
While strawberries are steeping, make the whipped cream by combining heavy cream with 1 tsp sugar and 1/4 tsp strawberry extract and 1/4 tsp vanilla extract. Whip with an electric hand mixer on medium speed until stiff peaks form. Set aside.
Once the strawberries and mint have steeped, add to them the simple syrup and ice. Re-cover and shake for 30 seconds.
Strain into a milkshake glass until all the juice has come out. It might be easier to use an actual strainer rather than the cocktail strainer, as the strawberries can block the cocktail strainer holes.
Pour 4 oz of soda water over the juice. For a lightly sweet cream soda, use plain soda water. For a sweeter cream soda, use a flavored soda water such as lemon, orange, or strawberry.
Spoon the whipped cream on top of the soda. It should be close to the top of the glass. Garnish with a mint leaf and a skewer of scone pieces and strawberry.